In an earlier post, NAND and NOR gate using CMOS Technology, we have seen the implementation of 2 input NAND and NOR gate using CMOS technology. In this article, we will discuss how to implement 2 input AND and OR…
Category: VLSI Technology
What are Test Chips in VLSI
A test chip is a small-scale integrated circuit that is specifically designed for testing purposes, feasibility checks and performance analysis. It serves as a platform for evaluating the functionality of individual circuit blocks, testing the reliability of manufacturing processes, and…
What is MPW in VLSI
MPW stands for Multi-Project Wafer, which is a cost-effective way to prototype integrated circuits. In an MPW, multiple projects share a single wafer during the fabrication process, which enables lower costs by spreading the cost of the wafer among multiple…
What is a Wafer in VLSI
A wafer is a thin slice of semiconductor material, typically made of silicon, that serves as the substrate for the fabrication of integrated circuits in the field of VLSI. During the fabrication process, the wafer undergoes a series of processes…
Resistive Divider Circuit
Resistive divider circuit can alternatively be called as voltage divider circuit. Such a circuit is shown in the following figure: This circuit divides the input voltage Vin depending on the resistance values according to the following formula: Vout = Vin…
Resistive Divider Layout Simulation
Now we are ready to simulate the layout view off this cell. Let’s open up the schematic view of the cell and copy the SPICE code. Go back to the layout view and paste the SPICE code. Increase the text…
Resistive Divider Layout
Open the layout view of the Resistive_divider cell and then copy/paste (Ctrl+C/Ctrl+V) an additional resistor. Running a DRC (pressing F5) on the above layout results in the following error. By pressing > we see that there is too little space…
Resistive Divider Schematic Simulation
Now we would simulate the resistive divider circuit which has been built, and would observe the output voltage w.r.t. a particular input voltage. For this we need to write a SPICE code which would give the description of the input…
Resistive Divider Schematic
Before starting the schematic design let’s celebrate the fact that the most commonly used following shortcuts in our daily life are also valid for Electric VLSI. Now we would build a resistive divider circuit. Go to the schematic view of…
Setup of LTspice with Electric
LTspice is a free software which performs SPICE simulations for electronic circuits. We use LTspice for spice simulation of the circuit designed in Electric. Setting in Electric Following are the steps to be followed to set up LTspice with Electric:…